Improvement in stone and  glass polishing machines



3 Sheets-Sheet 1..

H. B. PURDY & D. S. BLUE. STONE AND-GLASS POLISHING MACHINE. No.179,0'56. Patented. June 20,1876.

WITNESSES JVV R M y W Attorneys N. PETERS, PHOTO-LITHOGRAPHER.WASHINGT'QN, D C

3 SheetsSheet Z.

Hf-B. PURDY & D. S. BLUE. STONE'AND'GLASS POLISHING MACHINE. $1,179,056, Patented June 20,1876.

0% I W By MMW W .dttorneys N. PEI'ERS. PHOTO-LITHOGRAFHER. WASHINGTON, DC. v

3 Sheets-Sheet 3.

H. B. PURDY &-n.- s. BLUE. STONE AND GLASS POLISHING MACHINE.

No.179,056 Patented J'une 20,1876.

WITNESSES v IflJgVEA/TOR Um :n STAT S PATENT OFFICE.

I HENRY B. PURDY AND DENNIS S. BLUE, OF FREMONT, OHIO.

IMPROVEMENT IN STONEYAND GLASS POLISHING MACHINES.

Specification forming part of Letters Patent No. 179,056, dated J une20, 1876; application filed April 24, 1876.

To all whom it may concern:

Be it known that we, HENRY B. PURDY and DENNIS S.;BLUE, of Fremont, inthe county of Sandusky and in the State of Ohio, have invented certainnew and useful lmprovemen ts in Machine for Rubbing and Polishing Stoneand Marble; and do hereby declare that the follow-- ing is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,making a partof this specification.

The nature of our invention consists in the construction and arrangementof a machine for rubbing and polishing marble or stone, as will behereinafter more fully set forth.

In order to eiiable others skilled in the art to which our inventionappertains to make and use the same, We will now proceed to describe itsconstruction and operation, referring to the annexed drawings, in whichFigures 1 and 2 are perspective views from opposite sides of themachine. Fig. 3 is a 1ongitudinal section of the same. Fig. 4 is anenlarged vertical section of the sand-hopper. Fig- 5 is a bottom view ofthe rubber.-

A represents the bed'of the machine, across the center of which iserected a vertical frame, B, suitably braced on both sides. In suitableboxes at the upper end of the frame A is placed the horizontaldriving-shaft O, which may be operated by hand or power, as desired. Onthis shaft is secured a beveled cog-wheel, D,

which meshes with a beveled pinion, b, feathered on a vertical shaft, a.The upper end of the shaft a passes through a'box, d, and plate 6,between which the pinion b is placed. The shaft a passes loosely througha sleeve, f, which is provided with exterior screw-threads, and screwsdown through a nut, h, said nut,

I as well as the box d, being fastened to the front of the frame B. On'the upper endof the hollow screw-sleeve h is secured a handwheel, E,which bears against the under side of a flange or collar, i, on theshaft a, and the lower end of said sleeve is swiveled in a coupling, k,attached to the shaft a. By this means the rubber G, connected to thelower end of the shaft a can be raised and lowered as required, and alsorotated by the revolution of the main shaft 0. The rubber-wheel G is'uuade of cast-iron or other suitable material,

and provided on its upper surface with a cup or hopper, m, to receiveand hold the sand and water, and in the bottom of this-cup are holes,.r, through which such sand and water pass to the under side of therubber-wheel. From each hole a eirtends a groove, y, on the under sideof the rubber-wheel, radiallyto the circumference, for the sand andWater to work to the outer edge of said rubber-wheel.

the belt t over different-sized pulleys. The

water to be used is pumped from a tank or cistern, J, into a keg orreceptacle, K, by

means of a pump, L, operated by a pitman, M, pivoted to a fly-wheel, N,on the-end of the main driving-shaft O. From the receptacle K the waterpasses to the cuppa through a pip.e,.w, and is regulated by a faucet orstopcock, 2;.

w, so that the supply is kept up, and a wastepipe, a, carries theover-plus water back into the receptacle K, thereby keeping up a steadyheath O is the carriage upon which the stone or marble to be dressed islaid. This carriage moves upon small wheels b, mounted within the bed A,and the carriage is guided in its movement backward and forward by meansof a stationary rod, 01, passing through plates a, secured on the endsof the carriage. On the under side of the carriage O is fastened arackbar.f, which meshes with a pinion, t", on a transverse shaft, 11..This shaft may be operated by hand by means of a lever P pivoted looselyon the shaft and provided with aspringpawl, R, to take into a notched orcogged wheel, m, secured on the shaft so as to rotate said shaft ineither direction, and hence move the carriage back and forth,as'desired. Or this shaft may be operated from the main shaft 0 by cordsor belts n a, passin around Through the lower end 0f the shaft a'ispassed a pin, 12,

The pump L is arranged to pump up more water than is passed through thepipe pulleys thereon, and around shifting-pulleys S S on the shaft h,said pulleys S S being shifted by a lever, V.

This machine is simple in construction and easily operated. For highpolishing wense a rubber-wheel made of wood with felt fastened on theunder side of the wheel.

Having thus fully described our invention,

- what we claim as new, and desire to secure by Letters Patent, is-

1. The combination of the rubber-wheel G, with the cup on, havingslotted sides, the shaft 0., pin 1), and keys at 02., substantially asand for the purposes herein set forth.

2. The combination of the sand-box H, worm I, spout r, pipe 8, and cup mon the rubberwheel G, substantially as and for the purposes herein setforth.

3. The combination of the tank or reservoir J, pump L, operated from themain shaft 0, the barrel or receptacle K, pipe w, with faucet 'v, andcup m on the rubber-wheel G, substantially as and for the purposesherein set forth.

4. The combination, with the rubber-wheel Grand shaft a, of the hollowscrew with wheel E, nut h, pinion b, and cog-wheel D on the main shaft0, all as and for the purposes herein set forth.

5. The combination of the carriage 0, provided with perforated endplates 0, the sta tionary guide-rod d, rollers b, rack-bar f, and piniont", on the shaft h, substantially as and for thepurposes herein setforth.

In testimony that we claim the foregoing we have hereunto set our handsand seals this 11th day of March, 1876.

HENRY B. PURDY. DENNIS S. BLUE.

Witnesses:

E. F. DICKINSON, OSCAR BALL.

[L. s.] [L. s.]

